174 PALAEONTOLOGY OF NEW JEESEY. 



depressed convex with small appressed beaks and a slight angulation pass- 

 ing from the beak to the posterior extremity, forming a narrow posterior 

 cardinal slope. Surface, as shown on the cast, marked by fine concentric 

 lines of growth. Muscular scars proportionally large and moderately dis- 

 tinct, and an indication of a rather deep sinus in the pallial line. 



This species differs from V, lintea in the more transverse form, less an- 

 gular umbonal ridge, which is also situated nearer to the cardinal border; 

 in the less elevated form and more arcuate basal margin, and also conspic- 

 uously in want of the coarse, regular, concentric markings of the surface 

 seen on that one. In regard to its generic affinities there may be a little 

 doubt, as the hinge has been much less thickened and consequently the im- 

 pressions of the teeth are less conspicuous and consequently less certain. 



Formation and locality, — In the dark micaceous clays below the Lower 

 Marls at the Rev. G. C. Schank's pits near. Marlborough, Monmouth County, 

 New Jersey. From Professor Lockwood's collection. 



Veleda transversa, n. sp. 

 Plate XXXIII, Fig. 22. 



Shell transversely eUiptical, about three-fifths as high as long and very 

 depressed convex; beak, as seen on internal casts, rather prominent and 

 pointed, situated at or a httle behind the anterior third of the entire length 

 of the shell; umbonal angle very distinct but not elevated ; basal and car- 

 dinal margins nearly equally arcuate, the anterior end broadly rounded and 

 the posterior obliquely truncate, being longest at the point where the um- 

 bonal ridge cuts the margin. Surface of the shell marked by regular, even, 

 concentric ridges, about five of which occupy an eighth of an inch in width 

 near the basal margin of the specimens figured. Hinge-line unknown, 

 except the short lateral teeth on each side of the beak shown by the linear 

 depressions on the cast. 



This species is nearly of the form of V. tellinoides, but is less pointed behind, 

 has a more prominent and more angular umbonal ridge, and the beak is some- 

 what more distant from the anterior end, and the surface more coarsely striate. 



Formation and locality, — In the dark micaceous clays below the Lower 

 Marls at Marlborough, New Jersey, in Mr. Lockwood's collections from that 

 place. 



